iv had 4 houses built 3 of them by my mother and father in law 1 by a company. They are all still standing 15 years later was when the first 1 was built down in the village thai village still not a bit of movement, 3 on my land now including my big family home ,so each to there own ,makes no difference how much experience you have in building, if you not building it,
easy just don't put concrete down for paths and drives ,you would need drainage, more expense with the amount of rain in rainy season ,just use stone pebbles, on top of the land natural drainage.
not really mate a week or 2 in dry wheather and a constant rolling and compacting will be ok,as most big homes structure now is pile drive posts that go down for a long way to original ground.
yes you can I have 3 houses and a large swimming pool on my land my big house built by a builder, and 2 built by father in law 10 years plus ago ,no permission applied for 2 father in-laws built or 16 meter pool.